Connect the black cable of the multimeter to negative terminal of the battery, and the red cable to the positive terminal. The voltage should be between 13.5 and 14.8 volts with the engine running. Switch on the accessories in your 5 Series, for example, headlights, AC fan at full speed, and interior lights.
Here I show you how to remove a Battery from a 5 Series BMW. The connections look mega complicated but there is an easy way out.Buy BMW EQ Battery:
There is plenty of information on the forums about this but the way to do this is to hook up the jumper points under the hood of the car to another car or battery WHILE you change the batteryWhere exactly is the battery located in the 2004 545i? 5 Series. E60 / E61 (2004 - 2010) A forum community dedicated to BMW owners and enthusiasts. Come join
These batteries are usually in the boot compartment on the right-hand side. The location helps prevent the engine from damaging the car battery in the long run. Many first-time BMW owners find it a challenge to locate the battery. Some people even assume the modern BMW models do not have batteries since the area is well-covered.
Simply press the rearmost end and flip the cover towards the front of the car. Using the same metric socket, back off the nut about 8 turns. Wiggle the Positive clamp and remove it. On the front end, you will see a 90 degree ell connected to the battery. This is the vent, gently pull it out from the battery only. ggLYP.